Lecture 3 Topic 7.5: Volume and Osmolarity Problem Solving

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Last updated 10:11 PM on 3/28/26
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5 Terms

1
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an individual ingests a large amount of pure water

  1. how will this affect ECF osmolarity and volume? (is the most significant effect on osmolarity or on volume)

  2. explain the compensatory reflexes that will occur (osmoreceptors, volume + baroreceptors, GFR)

  3. after compensatory responses, what will happen to osmolarity and volume?

2
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an individual ingests a large amount of salt without water

  1. how will this affect ECF osmolarity and volume? (is the most significant effect on osmolarity or on volume)

  2. explain the compensatory reflexes that will occur (osmoreceptors, volume + baroreceptors, GFR)

  3. after compensatory responses, what will happen to osmolarity and volume?

3
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an individual is plays tennis on a day with temp. = 95F and humidity = 90% for 2 hrs. as a result, she sweats severely (loses a large volume of sweat) and does not re-hydrate adequately

  1. how will this affect ECF osmolarity and volume? (is the most significant effect on osmolarity or on volume)

  2. explain the compensatory reflexes that will occur (osmoreceptors, volume + baroreceptors, GFR)

  3. after compensatory responses, what will happen to osmolarity and volume?

4
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an individual is in a car accident and loses 20% of his blood volume due to hemorrhage

  1. how will this affect ECF osmolarity and volume? (is the most significant effect on osmolarity or on volume)

  2. explain the compensatory reflexes that will occur (osmoreceptors, volume + baroreceptors, GFR)

  3. after compensatory responses, what will happen to osmolarity and volume?

5
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an individual is suffering from congestive heart failure. his left ventricle is weakened and is not pumping forcefully

  1. how will this affect ECF osmolarity and volume? (is the most significant effect on osmolarity or on volume)

  2. explain the compensatory reflexes that will occur (osmoreceptors, volume + baroreceptors, GFR)

  3. after compensatory responses, what will happen to osmolarity and volume?